REGULATION - REGULATORY FILINGS (Details) - USD ($) $ in Thousands	Mar. 30, 2020	Mar. 16, 2020	Nov. 15, 2019	Nov. 01, 2019
NJNG EE Recovery Rate | NJNG
Schedule of Regulatory Filings [Line Items]
Approved rate increase (decrease), amount				$ 11,300
Base Rate Stipulation
Schedule of Regulatory Filings [Line Items]
Approved rate increase (decrease), amount			$ 62,200
Approved rate increase (decrease)			6.95%
Approved return on equity			9.60%
Approved equity capital structure, percentage			54.00%
Approved depreciation rate			2.78%
RAC | NJNG
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount		$ 1,200
NJCEP | NJNG
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount		$ (600)
NJ RISE Program | NJNG
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount	$ 7,400
Series II | NJNG
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount	$ 68,700